1221003331233 has 32 divisors (see below), whose sum is σ = 1891204288512. Its totient is φ = 686232302400.

The previous prime is 1221003331213. The next prime is 1221003331243. The reversal of 1221003331233 is 3321333001221.

It is not a de Polignac number, because 1221003331233 - 2¹⁸ = 1221003069089 is a prime.

It is a super-2 number, since 2×1221003331233² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221003331213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30610060 + ... + 30649922.

It is an arithmetic number, because the mean of its divisors is an integer number (59100134016).

Almost surely, 2^{1221003331233} is an apocalyptic number.

It is an amenable number.

1221003331233 is a deficient number, since it is larger than the sum of its proper divisors (670200957279).

1221003331233 is a wasteful number, since it uses less digits than its factorization.

1221003331233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63845.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 1221003331233 its reverse (3321333001221), we get a palindrome (4542336332454).

The spelling of 1221003331233 in words is "one trillion, two hundred twenty-one billion, three million, three hundred thirty-one thousand, two hundred thirty-three".